@base: 3.75;
.outer {
  display: flex;
  flex-direction: row;
}
.box2 {
  width: (50vw / @base);
  height: (100vw / @base);
  background-color: yellowgreen;
}
img {
  width: (60vw / @base);
}
.box3 {
  width: (50vw / @base);
  height: (40vw / @base);
  background-color: rosybrown;
}
